Factors of 400 in pairs

Factors are pairs of numbers which, if multiplied together, give the original number.

The number 400 is a composite number. So, 400 has more than one factor pair.

These are all the factor pairs of 400:

• 1,400
• 2,200
• 4,100
• 5,80
• 8,50
• 10,40
• 16,25
• 20,20

Here is how to find the factor pairs for the number 400:

• 400 divided by 1 is 400. So, (1, 400) is a factor pair of 400
• 400 divided by 2 is 200. So, (2, 200) is a factor pair of 400
• 400 divided by 4 is 100. So, (4, 100) is a factor pair of 400
• 400 divided by 5 is 80. So, (5, 80) is a factor pair of 400
• 400 divided by 8 is 50. So, (8, 50) is a factor pair of 400
• 400 divided by 10 is 40. So, (10, 40) is a factor pair of 400
• 400 divided by 16 is 25. So, (16, 25) is a factor pair of 400
• 400 divided by 20 is 20. So, (20, 20) is a factor pair of 400

Factor pairs of 400 that ads up to a number:

• The factors of 400 that adds up to 401 are 1 and 400
• The factors of 400 that adds up to 402 are 2 and 200
• The factors of 400 that adds up to 404 are 4 and 100
• The factors of 400 that adds up to 405 are 5 and 80
• The factors of 400 that adds up to 408 are 8 and 50
• The factors of 400 that adds up to 410 are 10 and 40
• The factors of 400 that adds up to 416 are 16 and 25
• The factors of 400 that adds up to 420 are 20 and 20

Note 1: if we change the order of all pairs above, we can double the number of pairs. We choose not to show them.
Note 2: do not confuse these pairs with prime factors. See below some info:

The factorization or decomposition of 400 is 2⁴•5².

The prime factors of 400 are 2 and 5. It is the list of the integer's prime factors.